Riacho Fundo II weather in September

In September, Riacho Fundo II sees average daytime highs of 30°C and overnight lows near 18°C, with 35 mm of rain across 5.5 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Riacho Fundo II's 4th-clearest and 3rd-windiest month. For the whole year in context, see Riacho Fundo II's year-round climate.

Daytime high
30°
1st warmest
Overnight low
18°
6th coldest
Rainfall
35 mm
5.5 wet days
Daylight
11 h 54 min
7:09 AM – 7:04 PM
Cloud cover
42%
4th clearest
Wind
10 km/h
3rd windiest
Solar energy
6.09 kWh/m²
Travel score
5.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Riacho Fundo II reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73017
83017
93017
103018
113018
123018
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233018
243018
253019
263019
273019
283019
293019
303019

Riacho Fundo II weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°23022.412.84.5
Feb28° / 19°19219.612.54.6
Mar28° / 19°21421.912.14.6
Apr28° / 18°9313.311.76.0
May27° / 16°213.511.37.6
Jun27° / 15°50.811.18.4
Jul27° / 14°00.111.18.6
Aug29° / 16°61.511.57.4
Sep30° / 18°355.511.95.5
Oct30° / 19°12214.812.44.5
Nov28° / 19°22722.512.74.3
Dec27° / 19°24523.912.94.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18020
28020
37921
47921
57822
67822
77723
87723
97525
107525
117426
127426
137228
147228
157129
166931
176931
186832
196733
206634
216535
226436
236337
246139
256040
265941
275842
285743
295644
305644

Chance of precipitation in September

Any precipitation

Riacho Fundo II gets around 35 mm of rain over 5.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
19
29
39
49
59
69
79
810
910
1011
1112
1213
1314
1415
1516
1618
1719
1820
1922
2023
2125
2226
2328
2429
2531
2632
2733
2834
2935
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1781570
2771580
3771580
4771580
5771580
6771580
7761590
8751690
97416100
107416100
117217110
127217110
137018120
146819130
156520141
166321151
176122161
185923171
195524192
205325202
215125222
224826243
234527253
244327274
254027294
263827304
273627325
283427335
293326356
303226366

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 7:21 AM to 6:58 AM, and sunset from 7:02 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:217:02
211.77:217:03
311.77:207:03
411.77:197:03
511.77:187:03
611.87:177:03
711.87:177:03
811.87:167:03
911.87:157:03
1011.87:147:03
1111.87:137:03
1211.97:127:04
1311.97:127:04
1411.97:117:04
1511.97:107:04
1611.97:097:04
1711.97:087:04
1811.97:077:04
1912.07:077:04
2012.07:067:04
2112.07:057:04
2212.07:047:04
2312.07:037:05
2412.07:037:05
2512.07:027:05
2612.17:017:05
2712.17:007:05
2812.16:597:05
2912.16:597:05
3012.16:587:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.09 kWh/m².

For context, solar energy here swings from a low near 4.64 kWh/m² to a high of 6.1 kWh/m² in October across the year — September's 6.09 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
36.0Intense
46.0Intense
56.0Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Riacho Fundo II

In seasonPeak

None of Riacho Fundo II's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Riacho Fundo II's monsoon runs October–March, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Riacho Fundo II?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.5
Sightseeing
6th-best month of the year
7.7
Beach & pool
5th-best month of the year

September is a reasonable time to visit Riacho Fundo II for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Riacho Fundo II in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Riacho Fundo II sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Riacho Fundo II in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Riacho Fundo II peaks around February 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 15Jun 22UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep13Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Riacho Fundo II in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Riacho Fundo II is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 11 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 1830 µg/m³Jan 1511 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr14Moderate
May15Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep32Moderate
Oct21Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Riacho Fundo II?

Riacho Fundo II sits at 15.9°S, 48.0°W, 1,198 m above sea level, in Brazil. The nearest listed city is Recanto das Emas, 2.0 km away.

Topography around Riacho Fundo II

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Riacho Fundo II.

Within 3 km, the terrain around Riacho Fundo II has only modest variations in elevation — a maximum elevation change of 173 m around an average of 1,207 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 400 m; within 80 km, large variations in elevation — a maximum elevation change of 752 m.

The land around Riacho Fundo II is covered by artificial surfaces (37%) and grassland (29%) within 3 km, grassland (32%) and artificial surfaces (26%) within 16 km, and grassland (34%), trees (26%) and cropland (21%) within 80 km.

3 km
173 m
16 km
400 m
80 km
752 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Recanto das Emas 2.0 km · Riacho Fundo 4.0 km · Samambaia 6.0 km · Águas Claras 7.0 km · Taguatinga 7.0 km · Núcleo Bandeirante 9.0 km · Pôr do Sol 10 km · Vicente Pires 10 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Riacho Fundo II (-15.8981°, -48.0467°, elevation 1,198 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).